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Old Yesterday, 03:09 AM   #869
Laimface
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Originally Posted by jeez View Post
It's fine as long as it's it's there momentarily, not all the time. And a maximum of -3 at any given point.

During DD I might get a -4.5 at no more than 3k RPM so I'm trying to fix that now.
Yeah it sometimes goes -1, -2, -2.5, -3 between 3k and 4.5k in peak boost. Then back down to 0 again when the boost falls off. It's usually on 1 or 2 cylinders, never all of them. Stratified have had more than enough of my logs to determine if it's an issue or not lol.
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Old Yesterday, 09:46 AM   #870
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Update: Last night I received my first tune from Alex Installed the 3bar sensor and flashed the tune with my fingers crossed that nothing was wrong on start up. Car hiccuped on some air, but probably just the change in calibration. So far car drives fine. Was avoiding hard throttle input and the car only saw boost levels of 16psi hehe. Trying to keep close attention to LTFT and STFT before getting on it. Knock got close to -3 yesterday with a -2.5. Hoping after getting some miles in today I can get a decent set of logs tonight.
Are you planning on dynoing the car after the tune? I'm very curious to see what kind of numbers you get given your mod list looks almost identical to what I plan on installing in the next few months.
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Old Yesterday, 10:16 AM   #871
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Why 3bar if only 16 psi? You must be shooting for like 28psi or something right

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Old Yesterday, 11:30 AM   #872
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Why 3bar if only 16 psi? You must be shooting for like 28psi or something right

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3bar absolute. If you're running 22psi (gauge) boost for example, that's actually 2.53 bar absolute. More than the normal MAP sensor can take.
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Old Yesterday, 11:43 AM   #873
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I haven't been following cobb for some time now, but is Cobb now a viable option for full blown big turbo setups with different fuel injectors and map sensors?

I have a car that has both, currently on Eurodyne, and frankly the tuning situation sucks. Interested in input.
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Old Yesterday, 11:49 AM   #874
SC_MK6
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I haven't been following cobb for some time now, but is Cobb now a viable option for full blown big turbo setups with different fuel injectors and map sensors?

I have a car that has both, currently on Eurodyne, and frankly the tuning situation sucks. Interested in input.
Absolutely. They opened the door for the rest of the great custom tuners out there to get their hands on our rides using their AP. I recommend checking out Stratified Tuning. I'm not biased at all

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Old Yesterday, 12:21 PM   #875
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3bar absolute. If you're running 22psi (gauge) boost for example, that's actually 2.53 bar absolute. More than the normal MAP sensor can take.
The car reads up to 23psi on its own. Actually your car can make more boost than the map sensor reads as i learned this as well from experience. Thats why I was asking about your end goal psi.

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Old Yesterday, 12:51 PM   #876
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Originally Posted by erball View Post
I haven't been following cobb for some time now, but is Cobb now a viable option for full blown big turbo setups with different fuel injectors and map sensors?

I have a car that has both, currently on Eurodyne, and frankly the tuning situation sucks. Interested in input.
Your situation is actually where the most gains/driveability will be with custom tuning...especially if you're not happy with your current tuner.



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Old Yesterday, 01:34 PM   #877
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The car reads up to 23psi on its own. Actually your car can make more boost than the map sensor reads as i learned this as well from experience. Thats why I was asking about your end goal psi.

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I hit 23.2 PSI on my flash tune this morning. I have the stock map sensor. Is the extra .2 a false reading if it can only ready up to 23 PSI?
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Old Yesterday, 02:07 PM   #878
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I hit 23.2 PSI on my flash tune this morning. I have the stock map sensor. Is the extra .2 a false reading if it can only ready up to 23 PSI?
Must consider altitude level pressure. 14.7psi in 1 bar. 2.5 bar sensor = 36.7 psi. If you at sea level, 14.7 then car should be able to read 36.7 - 14.7 =22psi. Any other height and your car can detect (read) more (above sea) or less (below sea)

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Old Yesterday, 02:15 PM   #879
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Originally Posted by OhioMK6 View Post
I hit 23.2 PSI on my flash tune this morning. I have the stock map sensor. Is the extra .2 a false reading if it can only ready up to 23 PSI?
The electric boost stuff isn't always accurate. A good analog boost gauge imo is the best way to go.
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Old Yesterday, 02:18 PM   #880
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Are you planning on dynoing the car after the tune? I'm very curious to see what kind of numbers you get given your mod list looks almost identical to what I plan on installing in the next few months.
I will hopefully have the car on the dyno before the end of the year. Thinking in the November/December time frame. Local shop has a SuperFlow dyno. Shop likes to boast that their dyno is a "lie detector" test lol. Honestly more like a heart breaker because I was hoping for more power. Late November last year car made 305hp/299tq with the meth added. Hoping to beat those numbers. Literally the only changes between then and now are my wheels, the UB, corner balance, and now pro tuning in the works.

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Why 3bar if only 16 psi? You must be shooting for like 28psi or something right
The tune right now just supports the 3 bar. Alex and I haven't gotten past the first set of data logging yet to really mess with boost. Think he has it still set to max out at 22 psi until he runs my data and tunes for more.The 16 psi I had mentioned earlier was just in reference to how little I was pushing the car with its first alteration of the tune. Feeling it out. Making sure things feel good. Experienced my first ever boost leak from loose vacuum line to boost gauge yesterday and that put a slight delay on getting logs. Trying to let the ECU refresh its data (although it happens so fast) and remember more frequently to turn off meth when I start the car. Not tuning for meth right now and I know I have forgotten to turn it off once or twice. No juice for the car yet until a 91 tune can be had.
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